TV Guide has a preview of this year's hamsters, and for the most part it's the usual drivel recycling each cast member's cliches. The only items of real interest are the opening paragraphs where Allison Grodner explains the "green" and "high school clique" themes of this year:

Nobody ever really leaves high school behind—and that’s the twist of Big Brother 11 (premiering Thursday, July 9, 8/7c). “This season you won’t need to wait for the houseguests to form alliances,” says executive producer Allison Grodner. “We’re immediately going to divide them into high-school cliques, depending on where they would have sat in the cafeteria—the popular kids, the athletes, the super-smart ones and the off-beat ones.” A mystery 13th houseguest—rumored to be a popular, hell-raising contestant from BB’s past—will appear at the end of the first episode and join one of the four groups.

“We’re asking the houseguests to live green this season,” adds Grodner. The design of the BB house is heavy on eco-friendly reconstituted wood, while the prized Head of Household bedroom is designed like a seaside suite at Big Sur, complete with driftwood and a waterfall. Houseguests will be required to sort and recycle leftover food into a compost bin and tend to a backyard vegetable garden they can eat from when they lose a food competition. What? Food restriction is no longer just slop? “It’s going to be so much bigger than that,” Grodner says. “The food competition isn’t only about food anymore—if you fail to win, it can also affect your living conditions in the house. We’re calling it the Haves and the Have Nots. You might lose hot-water privileges and have to take cold showers. You might be forced to sleep in one of the bedrooms that’s the worst we’ve ever had on BB in terms of its comfort and privacy level. It’s the kind of thing that could trigger big power shifts in the house.”